Process for the preparation of ortho-substituted...

Details Process for the preparation of ortho-substituted... Process for the preparation of ortho-substituted...

C - Chemistry, Metallurgy

07

C

260/466.05

C07C 257/08 (2006.01) C07C 251/24 (2006.01)

Patent

CA 1305171

Abstract of the disclosure: HOE 87/F 097 The present invention describes a process for the pre- paration of compounds of the formula I Image (I) in which R denotes fluorine, chlorine, bromine or (C1-C4)alkyl, R1 denotes (C1-C4)alkyl, R2 denotes H, methyl, methoxy, fluorine, chlorine, bromine or trifluoromethyl, and X denotes Cl or Br, by reaction of nitriles of the formula II Image R1-OH (II) (III) with alcohols of the formula III and hydrogen chloride or bromide, which comprises carrying out the reaction under pressure at temperatures from -10°C to +50°C, if approp- riate in the presence of a diluent, and subsequently converting the resulting hydrochloride or hydrobromide into the free base.

563083

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